International Journal on Advanced Science, Engineering and Information Technology, Vol. 10 (2020) No. 4, pages: 1654-1661, DOI:10.18517/ijaseit.10.4.6022

Modelling and Optimization of Alginate-Chitosan Concentration towards Tensile Strength Pervaporation Membrane based Polyethersulfone-Biopolymer by Using Response Surface Methodology

Yusuf Hendrawan, Nadiya Fisriana Putri, La Choviya Hawa, Muchnuria Rachmawati, Bambang Dwi Argo

Abstract

Some outstanding features in the use of pervaporation technology are light, low maintenance, low energy consumption, and eco-friendly. The optimization of membrane mechanical properties is vital to determine the strength of the membrane against the force which comes from outside and is unfortunately destructive, one of which is tensile strength. The purpose of this research is to find out the best combination of alginate and chitosan concentration, which produces polyether sulfone-biopolymer based pervaporation membrane with optimal tensile strength. Several membrane compositions have been prepared and varied in a way to obtain optimal membranes. The modeling and optimization method, which was applied by the researcher is the Response Surface Methodology (RSM). In the Central Composite Design (CCD) design, the low level included for both factors is 2% concentration, and the high level is 4% concentration, with a total of 13 experimental designs. The result of the suggested model is a quadratic model. While on the optimization result, the optimum solution result is from a combination of 3.25% alginate and 2.91% chitosan concentration, which yield tensile strength value of 0.24 kgf/cm2 with a desirability value of 0.84. The validation results are withdrawn from the three test samples resulted in an average tensile strength of 0.25 kgf/cm2 where this value differed 1.2% from the predicted results. The validation results are considered acceptable because the value is still within the acceptable error threshold or below 5%.

Keywords:

optimization; pervaporation membrane; response surface methodology; tensile strength.

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